We are investigating the potential of the “vortex” laser beam to provide additional information of natural scenes from aircraft and space-based lidars. This type of beam has a spatial wavefront with a helical twist that creates an optical singularity on axis, and carries orbital angular momentum. We will report on preliminary results for differences in Rayleigh-Mie scattering, and scattering from rough surfaces, and plans for future studies.
In this work, the super-thin cloud detection algorithm , that uses the polarization angle of the backscattered solar
radiation to find the super-thin clouds, is briefly reviewed and the retrieval of the optical thickness of these clouds is
proposed. We found that at the neighborhood angles of the backscattering direction, these clouds can be reliably
detected. The polarized components of the reflected light may be used to retrieve the optical thickness of these
Biological cells can be considered as dielectric objects with a given refractive index distribution. Light scattering simulations provide us with an efficient tool for studying cell morphology as well as the nature of scattering and its sources. The analysis of this information is the basis for a better understanding and development of new optical methods for non-invasive biomedical diagnostics. Here we demonstrate the potential of Finite-Difference Time-Domain (FDTD) method based software tools for the simulation of light scattering from single cells in situations where other approaches simply do not work or the approximations inherited in them begin to be questionable.